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From "Paul Rogers (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-5601) Rollup of External Sort memory management fixes
Date Wed, 21 Jun 2017 18:40:00 GMT
Paul Rogers created DRILL-5601:
----------------------------------

             Summary: Rollup of External Sort memory management fixes
                 Key: DRILL-5601
                 URL: https://issues.apache.org/jira/browse/DRILL-5601
             Project: Apache Drill
          Issue Type: Task
    Affects Versions: 1.11.0
            Reporter: Paul Rogers
            Assignee: Paul Rogers
             Fix For: 1.11.0


Rollup of a set of specific JIRA entries that all relate to the very difficult problem of
managing memory within Drill in order for the external sort to stay within a memory budget.
In general, the fixes relate to better estimating memory used by the three ways that Drill
allocates vector memory (see DRILL-5522) and to predicting the size of vectors that the sort
will create, to avoid repeated realloc-copy cycles (see DRILL-5594).



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